The ciliary muscles are made of layers of smooth muscle in a circular shape that helps suspend the lensThe main function of the ciliary muscles used to change the shape of the lens in the eye to help with focusing..
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Lens
The lens, by changing shape, functions to change the focal distance of the eye so that it can focus on objects at various distances
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Cornea
The cornea acts as the eye's outermost lens. It functions like a window that controls and focuses the entry of light into the eye. The cornea contributes between 65-75 percent of the eye's total focusing power. When light strikes the cornea, it bends
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Pupil
. The whole job of the pupil is to control the amount of light that gets into the eye. It's called a pupillary reflex, and you have probably noticed that a person
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Iris
The iris contracts and dilates involuntarily and changes the size of the pupil
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Suspensory ligaments
The muscles that move the eyeball are attached to the sclera. Suspensory ligament of lens - a series of fibers that connect the ciliary body of the eye with the lens, holding it in place
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Sclera
Sclera. The sclera is the opaque, fibrous, tough, protective outer layer of the eye (“white of the eye”) it provides protection and form
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Choroid
The human choroid is thickest at the far extreme rear of the eye (at 0.2 mm), while in the outlying areas it narrows to 0.1 mm. The choroid provides oxygen and nourishment to the outer layers of the retina. Along with the ciliary body and iris
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Retina
The retina is a thin layer of tissue that lines the back of the eye on the inside. It is located near the optic nerve. The purpose of the retina is to receive light that the lens has focused, convert the light into neural signals, and send these sign
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Fovea
In the eye, a tiny pit located in the macula of the retina that provides the clearest vision of all. Only in the fovea are the layers of the retina spread aside to let light fall directly on the cones, the cells that give the sharpest image. Also cal
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Optic disc
The optic disc or optic nerve head is the point of exit for ganglion cell axons leaving the eye. Because there are no rods or cones overlying the optic disc, it corresponds to a small blind spot in each eye.
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Optic nerve
The optic nerve is located in the back of the eye. It is also called the second cranial nerve or cranial nerve II. It is the second of several pairs of cranial nerves. The job of the optic nerve is to transfer visual information from the retina to th
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Central artery and vein
The central retinal vein returns the blood to the heart. The artery is a branch of the ophthalmic artery, and works to form the arterioles (smaller branches of an artery) of the retina
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Other cards in this set
Card 2
Front
The lens, by changing shape, functions to change the focal distance of the eye so that it can focus on objects at various distances
Back
Lens
Card 3
Front
The cornea acts as the eye's outermost lens. It functions like a window that controls and focuses the entry of light into the eye. The cornea contributes between 65-75 percent of the eye's total focusing power. When light strikes the cornea, it bends
Back
Card 4
Front
. The whole job of the pupil is to control the amount of light that gets into the eye. It's called a pupillary reflex, and you have probably noticed that a person
Back
Card 5
Front
The iris contracts and dilates involuntarily and changes the size of the pupil
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